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33
COMMISSIONING
TO FILL AND TURN ON THE WATER HEATER
The power supply to the solar storage tank and solar control unit must not be switched on until
the water heater is filled with water and a satisfactory megger reading is obtained.
• Open all of the hot water taps in the house (don’t forget the shower).
• Open the cold water isolation valve fully on the cold water line to the water heater. Air will be forced
out of the taps.
• Close each tap as water flows freely from it. Check the pipe work for leaks.
• Bleed the solar collectors (refer to
“Bleeding the Solar Collectors” on page 33).
• Plug in the solar control unit at the power outlet and switch on the electrical supply. The power
outlet must be switched on for the solar control unit to operate and solar gain to be achieved.
• Switch on the electrical supply at the isolating switch to the solar storage tank.
Explain to the householder the functions and operation of the solar water heater. Upon completion of
the installation and commissioning of the water heater, leave this guide with the householder.
BLEEDING THE SOLAR COLLECTORS
Upon completion of the installation, it is necessary to purge the air from the collector circuit. To purge
air from the collector circuit:
• Ensure the water heater is full of water and all of the hot taps are turned off.
air bleed
valve
• Using a flat blade screwdriver, open the bleed valve fitted
adjacent to the solar hot water inlet of the solar storage tank
(see diagram).
• The mains pressure will force water to flow from the tank
and through the pipe work, forcing air from the collector
circuit through the bleed valve. This is evidenced by spurting
of water from the drain line connected to the bleed valve.
Warning: Exercise care to avoid any splashing of water,
as water discharged from the solar collectors may be of a
very high temperature.
• Close the bleed valve when water runs freely from the drain
line.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation, such as on a building site
or where the premises is vacant, then:
• Switch off the electrical supply at the isolating switch to the solar storage tank.
• Switch off the electrical supply at the power outlet to the solar control unit (refer to note below).
• Close the cold water isolation valve at the inlet to the water heater.
Note: The freeze protection system will be rendered inoperable if electrical power is not available. The
system has NO WARRANTY for freeze damage (refer to
“Warranty Exclusions” on page 37). If there is
a risk of freezing, then it is necessary to drain the solar collectors and connecting pipe work (refer to
“Draining the Solar Collectors” on page 34).